Transmission and Drivetrain: Technical Service Bulletins
- Recalls
- Customer Interest
- A/T - Erratic Shifts
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH:
- Harsh 3-2 and/or 4-2 Shifts:
- Intermittent Harsh Part Throttle 3-2 Shift:
- Harsh 3-2 Shift **High Altitude Only**
- Harsh 3-2 Shift **Low Altitude* Only**:
- Harsh 3-2 Shift Maneuver At 17-20 MPH:
- Harsh 3-2 Coastdown Bump 3.8L or 4.5L At 15-22 MPH:
- Harsh Upshifts - High Altitude Only:
- A/T - Delayed or No Engagement In Drive/Reverse
- A/T - No Reverse or Slipping in Reverse
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Erratic Shift, 2ND/3RD Starts, No TCC or Slipping
- A/T - Fluid Leak at Helix Converter Seal
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- By Symptom
- Abnormal wear/deterioration
- Customer Interest
- A/T - Erratic Shifts
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH:
- Harsh 3-2 and/or 4-2 Shifts:
- Intermittent Harsh Part Throttle 3-2 Shift:
- Harsh 3-2 Shift **High Altitude Only**
- Harsh 3-2 Shift **Low Altitude* Only**:
- Harsh 3-2 Shift Maneuver At 17-20 MPH:
- Harsh 3-2 Coastdown Bump 3.8L or 4.5L At 15-22 MPH:
- Harsh Upshifts - High Altitude Only:
- A/T - Delayed or No Engagement In Drive/Reverse
- A/T - No Reverse or Slipping in Reverse
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Erratic Shift, 2ND/3RD Starts, No TCC or Slipping
- A/T - Fluid Leak at Helix Converter Seal
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- A/T - No Movement in Drive or 3rd Gear
- Driveability
- Erratic Shifting
- Hard Shifting
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH:
- Harsh 3-2 and/or 4-2 Shifts:
- Intermittent Harsh Part Throttle 3-2 Shift:
- Harsh 3-2 Shift **High Altitude Only**
- Harsh 3-2 Shift **Low Altitude* Only**:
- Harsh 3-2 Shift Maneuver At 17-20 MPH:
- Harsh 3-2 Coastdown Bump 3.8L or 4.5L At 15-22 MPH:
- Harsh Upshifts - High Altitude Only:
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Inoperative
- Leaks
- No shift/Incorrect gear engagement
- Noise
- Recalls
- Slipping
- Vibration
- All Technical Service Bulletins
- Drivetrain - Information on Driveline Clunk Noise
- Vehicle - Engine And Sub Systems Flushing Info. (CANADA)
- Vehicle - Engine And Sub-Systems Flushing Recommendations
- M/T - Operating Characteristics Information
- A/T - Fluid Oil Cooler Flow Test
- A/T - 2-3 Upshift or 3-2 Downshift Clunk Noise
- A/T - Slight Vehicle Movement In Park At Start Up
- ACDelco(R) Remanufactured Transmissions - Program Update
- A/T - New Bottom Pan and Controlled Compression Gasket
- A/T - Growl/Vibration Felt Through The Floor Pan
- A/T - Transaxle Oil Filter Differences
- A/T - Erratic Shifts
- A/T - Harsh 3-2 Downshifts, Diagnosis & Repair
- Overview
- Very Harsh Part Throttle 3-2 Shift At 20-40 MPH:
- Harsh 3-2 and/or 4-2 Shifts:
- Intermittent Harsh Part Throttle 3-2 Shift:
- Harsh 3-2 Shift **High Altitude Only**
- Harsh 3-2 Shift **Low Altitude* Only**:
- Harsh 3-2 Shift Maneuver At 17-20 MPH:
- Harsh 3-2 Coastdown Bump 3.8L or 4.5L At 15-22 MPH:
- Harsh Upshifts - High Altitude Only:
- A/T - Oil Cooler Flushing Frequently Asked Questions
- A/T - Delayed Engagement In Drive/Reverse
- A/T - Delayed or No Engagement In Drive/Reverse
- A/T - No Reverse or Slipping in Reverse
- A/T - Revised Diagrams & Diagnostics
- A/T - Intermittent 2ND Gear Start in D2 When Cold
- A/T - Revised Scavenger Oil Scoop
- A/T - New Solenoid Testing Kit
- A/T - Service Procedure Changes
- A/T - Core Return Product Feedback Form
- A/T - Engine Vacuum Testing
- A/T - How To Use A Pressure Gauge
- A/T - Drive Axle and Wheel Lug Nut Torque Specifications
- A/T - Slipping or No-Shift/Metal Sealing Rings
- A/T - Front Bushing Wear
- A/T - Math Formulas Part I
- A/T - Twenty Steps To Successful Repairs
- A/T - Math Part II
- A/T - Choosing the Right ATF
- A/T - DEXRON III Fluid Introduction
- A/T - Erratic Shift, 2ND/3RD Starts, No TCC or Slipping
- Recall - 4T60 Reverse Servo Apply Pin Bore
- Transaxle 1-2 Servo & Side Case Cover - Revised R&R
- A/T - Revised End Play Specification
- A/T - Fluid Leak At Side Cover to Channel Plate Gasket
- A/T - Fluid Leak at Helix Converter Seal
- Axle Oil Seal, Right - Leaks at the Axle Tripod Shank
- M/T - Hydraulic Clutch Bleeding Procedure Improvement
- Engine, A/T - Shift/Driveability Concerns/MIL ON
- Front Wheel Drive Shaft Nut - Revised Torque Value
- A/T - Torque Converter Replacement Information
- A/T - No Movement in Drive or 3rd Gear
- A/T - Grinding/Growling Noise in Park on Incline
- A/T Control - DTC P0756 Diagnostic Tips
- A/T - Water Or Coolant Contamination Information
- A/T - DEXRON(R)-VI Fluid Information